Science Final
If the mass of an object is 200kg and the applied force is 2600N, calculate the acceleration.
13 m/s/s
If the acceleration is 600 m/s/s and the mass is 300 kg, calculate the force.
18000 N
A lamp sitting on a table is demonstrating Newton's ______ law.
1st
How are the three classes of levers different from each other?
1st class has the fulcrum in the middle 2nd class has the load in the middle 3rd class has the effort in the middle
A golf ball is hit a distance of 300 yards in 10 seconds. What is the speed of the golf ball?
30 yards/s
If the force is 2500 N and the acceleration is 500 m/s/s, calculate the mass.
5 kg
Mr. Smith is traveling from Houston, TX to Dallas, TX. It takes 4 hours to make the 224 mile trip. What is his velocity?
56 mph North or Northwest
Define Velocity
A change in distance over a specific amount of time (speed) plus direction. ex. A car moving at 60 mph east
Define Speed
A change in distance over a specific amount of time. ex. A car moving at 60 mph
What does Acceleration look like on a distance time graph?
A curved line
What is the definition of a force?
A push or a pull.
What does Speed look like on a distance time graph?
A straight diagonal line
What does no motion look like on a distance time graph?
A straight horizontal line
A rollercoaster heading down a hill is _______________.
Accelerating
To find the net force of two objects at the same direction you would ________________ their forces
Add
Balanced or Unbalanced Force: A book sitting on a shelf.
Balanced
Balanced or Unbalanced Force: A lamp sitting on a table.
Balanced
Balanced or Unbalanced Force: A soccer ball sitting on the ground motionless.
Balanced
Balanced or Unbalanced Force: The moon orbiting the earth at a constant speed.
Balanced
Balanced or Unbalanced Force: Two ice skaters moving in a straight line at a constant speed.
Balanced
What does Newtons 3rd law state?
For every action there is an equal and opposite reaction.
Newton's 2nd law says the acceleration of an object depends on its ________________ and _________.
Force or applied force, mass
Net force is a combination of al __________ acting on an object.
Forces
This machine is sometimes called a ramp, and is used when lifting a load too heavy to lift straight up.
Incline plane
Why does an object stay at rest?
It takes an unbalanced force to move it.
The ________/________ distance between threads on a screw will make the work easier.
Less/ Smaller
The __________ consists of a bar that pivots on a fulcrum.
Lever
List the six simple machines.
Lever, Inclined Plane, Pulley, Wedge, Screw, Wheel and Axle.
The total amount of all the forces on an object is called the ___ _____.
Net Force
Which of Newton's Laws explains a rocket's movement during launch?
Newton's third law
Force is measured in _________.
Newtons
Describe two ways that simple machines make work easier.
Simple machines can either increase the force applied to an object or change the direction the force is moved.
What is the formula d/t used to calculate?
Speed and Velocity
If a soccer ball was kicked first by second grade and then again by an eighth grader, what will be the difference in the ball's acceleration?
The ball will accelerate more when kicked by the eighth grader.
Define Acceleration
The change in velocity over a specific amount of time. Includes speeding up, slowing down, or changing direction. ex. A car accelerating at 60 m/s/s
What happens to the direction of an object as an unbalanced force acts on it?
The direction of the object will change
What are two ways an object can accelerate without speeding up?
The object can change direction or The object can slow down.
What happens to the position of an object as an unbalanced force acts off it?
The position of the object will change.
What happens to the speed of an object as an unbalanced force acts on it?
The speed of the object will either increase or decrease.
The ________/_________ the wedge is, the easier the work is.
Thinner, Sharper
An ______________ force always causes a change in position, speed or direction of the object.
Unbalanced
Balanced or Unbalanced Force: A car accelerating around a mountain curve.
Unbalanced
Balanced or Unbalanced Force: A gymnast on a balance beam doing a backflip.
Unbalanced
Balanced or Unbalanced Force: A rocket lifting off the launch pad.
Unbalanced
Balanced or Unbalanced Force: A skier skiing through flags in a race down the mountain.
Unbalanced
Balanced or Unbalanced Force: Cars in a NASCAR race speeding around the track.
Unbalanced
30 mph west is an example of _____________.
Velocity
What is the difference between the velocity and speed of an object?
Velocity has a direction associated with it, while speed has no specific direction.
The _________________ makes work easier by moving part of the machine faster than the force put into the machine.
Wheel and axle
What is a car doing as it rounds a curve?
accelerating
A force that is at rest or moves in at a constant speed and in a constant direction is called a ______________ force.
balanced
If an object stays still or contenues moving at the same speed and direction, it is a ____________ force.
balanced
The conductor of a train moving at a constant speed sees a cow on the track. Why is it likely that the train will not be able to stop quickly enough to save the cow?
because the mass is to great
A _____________ is a push or a pull on an object.
force
A force that causes an object to slow down when it touches another object is _____________.
friction
Sitting at the top of a steep hill on a roller coaster (not moving), is an example of:
inertia
The less steep the ramp is, the ______ force required. However, the ______________ is increased.
less, distance
What is the unit for speed?
m/s or mph
What unit is used for Acceleration?
m/s^2
A ___________ uses a wheel and rope to change the direction of the force.
pulley
A __________ works like an incline plane wrapped around a cylinder.
screw
A car traveling at 65 mph is an example of its _____________.
speed
To find the net force of two objects moving in opposite directions you would _________ their forces.
subtract
The force applied on a lever by pushing down results in a pushing _______ on the other end.
up
A __________ is made up of two inclined planes put together.
wedge
